<script setup lang="ts">
import { ref, onMounted, computed } from "vue";

import { uuid } from "vue-uuid";

import type { FormInstance } from "element-plus";
import { User, Lock, Checked } from "@element-plus/icons-vue";

import { useRoute } from "vue-router";

import useStore from "@/stores";
import router from "@/router";

import { login } from "@/api/system/user";

import { LoginForm } from "@/entity/system/user";

import LocaleSelect from "@/components/LocaleSelect.vue";

const formRef = ref<FormInstance>();
const loginForm = ref(new LoginForm());
const loginRules = {
  username: [{ required: true, trigger: "blur", message: "用户名不能为空" }],
  password: [{ required: true, trigger: "blur", message: "密码不能为空" }],
  code: [{ required: true, trigger: "blur", message: "验证码不能为空" }],
};

const loading = ref(false);

const captchaUrl = ref<string>();

const { useUserStore } = useStore();
const route = useRoute();

const redirect = computed(() => {
  let redirect = route.query.redirect;
  if (redirect) return redirect as string;

  return "/";
});

function handleLogin(formEl: FormInstance | undefined) {
  if (!formEl) return;
  formEl.validate((valid) => {
    if (valid) {
      loading.value = true;

      login(loginForm.value)
        .then((response) => {
          const { access_token, token_type } = response.data;
          const accessToken = token_type + " " + access_token;

          useUserStore.setToken(accessToken);
          router.push({ path: redirect.value });

          loading.value = false;
        })
        .catch(() => {
          loading.value = false;

          refreshCaptcha();
        });
    }
  });
}

function refreshCaptcha() {
  let randomCode = uuid.v1();
  loginForm.value.randomCode = randomCode;
  captchaUrl.value = `${window.location.origin}${
    import.meta.env.VITE_APP_BASE_API
  }/captcha/${randomCode}`;
}

onMounted(() => {
  refreshCaptcha();
});
</script>

<template>
  <div class="login-container">
    <el-form
      ref="formRef"
      :model="loginForm"
      :rules="loginRules"
      label-width="0px"
      class="login-form"
    >
      <div class="title-container">
        <h3 class="title">{{ $t("login.title") }}</h3>
        <LocaleSelect />
      </div>
      <el-form-item prop="username">
        <el-input
          v-model="loginForm.username"
          :prefix-icon="User"
          auto-complete="off"
          :placeholder="$t('login.username')"
        />
      </el-form-item>
      <el-form-item prop="password">
        <el-input
          v-model="loginForm.password"
          type="password"
          :prefix-icon="Lock"
          auto-complete="off"
          :placeholder="$t('login.password')"
          @keyup.enter="handleLogin(formRef)"
          show-password
        />
      </el-form-item>
      <el-form-item prop="code">
        <el-input
          v-model="loginForm.code"
          :prefix-icon="Checked"
          auto-complete="off"
          :placeholder="$t('login.code')"
          style="width: 63%"
          @keyup.enter="handleLogin(formRef)"
        />
        <div class="captcha">
          <img :src="captchaUrl" @click="refreshCaptcha" />
        </div>
      </el-form-item>
      <el-form-item style="width: 100%">
        <el-button
          :loading="loading"
          type="primary"
          style="width: 100%"
          @click="handleLogin(formRef)"
        >
          <span v-if="!loading">{{ $t("login.login") }}</span>
          <span v-else>{{ $t("login.logining") }}</span>
        </el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<style lang="scss" scoped>
.login-container {
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #001e3a;

  .login-form {
    width: 320px;
    padding: 25px 25px 5px 25px;
    background-color: #fff;
    border-radius: 6px;

    .title-container {
      display: flex;
      margin-bottom: 30px;

      .title {
        margin: 0 auto;
      }
    }

    .captcha {
      width: 33%;
      height: 32px;
      margin-left: 12px;

      img {
        cursor: pointer;
      }
    }
  }
}
</style>
